34 Cooling System – NORMA Group

QuICK CONNeCtORs

Quick Connectors

Assembly is in locked position. The arrow marks the closed position.

Turn connector ring to open position. Pull connector backwards to disengage the joint. The connector is now released from its position.

Turn the connector ring back to its locked position. The arrow marks the closed position. Connector is now in a locked position and ready for engagement.

IMPORTANT NOTICENotch in male part must be aligned with arrows marking “locked position” when engaging the female part to the male.

Listen for audible “click” or feel when connector is fully engaged. Connecting joint is now in a locked position.

TWIST II

NORMA Group – Cooling System 35

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Standard design

Optional design

Optional design

TWIST III

TWIST III is a quick connector series for charged air system applications. Developed to meet extremely tough requirements, especially in low-emission vehicles, it combines a low assembly effort with very good hydrolysis tolerance, temperature resistance and mechanical performance. TWIST III operates at approx. 2.75 bar excess pressure and engine compartment temperatures of -48°C up to +135°C. Standard design confi gurations are straight. Special designs are also available.

Standard materials Quick and safe assembly/disassemblyStandard versions are made from recyclable polyamide 66 with 35% to 50% GF. O-rings are available in various materials, including AEM. Note that both plastic and metal spigots can be used.

TWIST III quick connectors have a 360° symmetrical design. As they can be opened from any angle, they are perfect for tight environments as well as spin-weld applications. Additional cut-outs or knobs are not necessary.

Assembling TWIST III is quick and easy. Press the self-locking spider ring onto the mating spigot and check that all the ring-locking tabs have passed the spigot’s locking edge. Then pull the connector to verify the connection.

To disassemble the connector, turn the spider ring counterclock-wise, hold it in the open position and pull it off the mating spigot. When the connector disengages from the spigot, release the spider ring to automatically return it to its relaxed (locked) position.

Standard sizes and designs

TWIST III connector size designations are determined by the sealing diameter (ØD1) of the TWIST III spigot. Current standard diameters are listed below. Larger diameters will be added in the future.

Five standard sizes are available. TWIST III SP (spin-weld) is for applications where the quick connector will be spin-welded to other injection or blow-molded plastic components. Based on recommendations from a spin-welding equipment supplier, this design includes weld surfaces, fl ash traps and support surfaces. This connector is tested using the GMW 15803 specifi cation as reference.

TWIST III Quick Connector Ø D1 (mm)

TWIST III 48.40 48.40

TWIST III 56.40 56.40

TWIST III 67.40 67.40

TWIST III 71.40 71.40

TWIST III 80.00 80.00

Standard sizes:

TWIST III

Optional designs

A hot-plate weld design (TWIST III HP) is used for housings in PBT material, when the connector has to be welded to a fl exible TPE / TPC-ET (HYTREL®) Duct, or with fl exible plastic ducts. It is also the standard solution when hot-plate/mirror welding is applied. A further special design TWIST III (AR) has an optional anti-rotation/assembly orientation feature. Other designs are also possible.

Please ask for details

TWIST III V0 (straight) and TWIST III V90 (90° bend) are optional designs with a hose barb for applications where a hose will be crimped/clamped onto the barb. Both allow reinforcement with an optional metal sleeve when required.

36 Cooling System – NORMA Group

Quick Connectors

QuICK CONNeCtORs